The MAX14523A/MAX14523AL/MAX14523B/MAX14523CATA+T programmable current-limit switches feature internal current limiting to prevent damage to host devices due to faulty load conditions. These current-limit switches feature a low 70mΩ on-resistance and operate from a +1.7V to +5.5V input voltage range. The current limit is adjustable from 250mA to 1.5A, making these devices ideal for SDIO (secure digital input/output) and other load-switching applications. Each device in the family handles an overcurrent event differently depending on the option selected. The MAX14523A/MAX14523AL go into an autoretry mode, the MAX14523B latches off the switch, and the MAX14523CATA+T features a continuous current-limit mode. Additional safety features include thermal shutdown to prevent overheating and reverse-current blocking to prevent current from being driven back into the source. The MAX14523A/MAX14523AL/MAX14523B/MAX14523CATA+T are available in a tiny 8-pin, 3mm x 3mm, TDFN package and operate over the -40°C to +125°C automotive temperature range. 
Feature
 
 
  
  - Accurate (±10%) Overload Current Limit 
 
  - Adjustable Current-Limit Threshold 
 
  - Low-Dropout Voltage (70mV at 1A Load Current) 
 
  - Short-Circuit Protection 
 
  - Thermal-Shutdown Protection 
 
  - Reverse-Current Protection 
 
  - 170μA (typ) Supply Current 
 
  - Shutdown Reverse Current, 0.6μA (max) 
 
  - +1.7V to +5.5V Supply Voltage Range 
 
  - Tiny 8-Pin, 3mm x 3mm, TDFN Package 
 
 
 
  
Applications
 
 
 
  - Cell Phones
 
  - GPS
 
  - MP3 Players
 
  - Notebook VGA Ports
 
  - SDIO Ports
 
  - USB Ports
 
  - UTCA/ATCA Platforms